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One experiment was conducted at the Rafael Fernandes Experimental Farm, in the Alagoinha district, rural area of Mossoró- Rn, Brazil, with the objective of evaluating optimized amount of hairy woodrose (Merremia aegyptia L.) in the productivity of coriander cultivars. The experimental design of randomized complete blocks with the treatments arranged in 5 x 2 factorial scheme with four replicates. The first factor consisted of four amounts of hairy woodrose (0.0, 1.0, 2.0, 3.0 and 4.0 kg/m² of dry beds) and the second factor corresponding to coriander cultivars (Verdão and Tabocas). The characteristics evaluated were: plant height, number of stems per plant, productivity, number of bunches and dry mass. The best productive performance for coriander cultivars was obtained in the amount of 3.0 kg/m2 hairy woodrose incorporated into the soil. Between the coriander cultivars, Verdão was more productive than cultivating Tabocas. The cultivation of coriander cultivars is agronomically viable with the use of hairy woodrose as green manure. [ABSTRACT FROM AUTHOR]